code: def test_skip_non_unittest_class(self):
      @unittest.skip("testing")
      class Mixin:
          def test_1(self):
              record.append(1)
  
      class Foo(Mixin, unittest.TestCase):
          pass
  
      record = []
      result = unittest.TestResult()
      test = Foo("test_1")
      suite = unittest.TestSuite([test])
      self.assertIs(suite.run(result), result)
      self.assertEqual(result.skipped, [(test, "testing")])
      self.assertEqual(record, [])
  
imports: import unittest
  from test.test_unittest.support import LoggingResult
label_desc: Use image node_id 5 for calling the Test_TestSkipping obj's underlying member method code with example usage: obj.test_skip_non_unittest_class() without return types